钡铁氧体厚膜在自偏置微带结环行器中的应用  

Application of Barium Ferrite Thick Films in Self-bias Micro-strip Junction Circulator

作　　者：谭科[1] 蒋洪川[1] 彭斌[1] 张万里[1] 汪渊[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《磁性材料及器件》2010年第4期38-41,共4页Journal of Magnetic Materials and Devices

基　　金：国家安全重大基础研究子课题资助项目(6136Z06.1)

摘　　要：采用丝网印刷工艺制备钡铁氧体厚膜,研究了玻璃粉含量对钡铁氧体厚膜结构和磁性能的影响。基于所制备的钡铁氧体厚膜设计并制备了自偏置微带结环行器。结果表明,所制备的钡铁氧体厚膜具有明显的c轴择优取向,随着玻璃含量的适当增加,钡铁氧体厚膜的剩磁比和矫顽力增大,磁性能提高。钡铁氧体厚膜在c轴方向上的最大剩磁比为0.72,矫顽力最高为286.6kA/m。钡铁氧体厚膜应用于微带结环行器,在中心频率38.6GHz处插入损耗为18dB,隔离度为40dB。Barium ferrite（BaFe12O19）thick films were prepared by screen-printing.The influences of glass content on the properties of the barium ferrite thick films were investigated.A self-biased micro-strip junction circulator was designed and fabricated using the prepared barium ferrite thick film.The VSM results showed that barium ferrite thick films has a predominant c-axis orientation.It can be clearly seen that the remanence ratios and the coercivity of barium ferrite thick films are improved with the increase of the glass content.The maximum remanence ratio of barium ferrite thick films is 0.72,and the maximum coercivity is 286.6kA/m.The fabricated circulator has an insertion loss of 18 dB and an isolation of 40dB at 38.6 GHz.

关 键 词：钡铁氧体厚膜 丝网印刷 自偏置 微带结环行器 

分 类 号：TN621[电子电信—电路与系统] TM277[一般工业技术—材料科学与工程]